(12) باب اسْتِحْبَابِ الرَّكْعَتَيْنِ فِي الْمَسْجِدِ لِمَنْ قَدِمَ مِنْ سَفَرٍ أَوَّلَ قُدُومِهِ
Jabir b. 'Abdullah reported:
I went with the Messenger of Allah (ﷺ) on an expedition and my camel delayed me and I was exhausted. The Messenger of Allah (ﷺ) thus came earlier than I, whereas I came on the next day and went to the mosque and found him (the Holy Prophet) at the gate of the mosque. He said: It is now that you have come. I said. Yes. He said: Leave your camel and enter (the mosque) and observe two rak'ahs. He (the narrator) said: So I entered and observed (two rak'ahs) of prayer and then went back.
Reference: Sahih Muslim 715 c
In-book reference: Book 6, Hadith 88
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1544